Wednesday, 25 March 2015

Cacti is an open source, front-end for the data logging tool called RRDtool. It is a web based network monitoring and graphing tool.

Install the following required packages for Cacti. Cacti and some of the
below prerequisites are not included in the CentOS official repository.
So let us install them from EPEL repository. To install EPEL repository enter the following commands.

Monday, 23 March 2015

The file about to be downloaded >1MB (larger than 1 MB) then it would be categorized as Download and if <1MB (smaller than1MB) this is categorized as Browsing.
The Confinguration is not limiting Bandwidth, but only just distinguish
the priority. So if there is no client browsing the download will be
fast again.

Ok I think is clear enough, and now how
do we apply the browsing can be prioritize when many clients use our
internet connection in mikrotik winbox.

Log in into your Winbox with a password that you have. If you not have
yet, ask with your internet service provider (ISP). Look at the picture
above! Go to the new terminal menu tab and right click and paste the script below at the cursor terminal command mikrotik.

Saturday, 14 March 2015

1 Preliminary Note

In this tutorial I use the hostname server1.example.com with the IP address 192.168.0.100. These settings might differ for you, so you have to replace them where appropriate.

2 Installing MySQL 5

To install MySQL, we do this:

#yum -y install mysql mysql-server

Then we create the system startup links for MySQL (so that MySQL starts
automatically whenever the system boots) and start the MySQL server:

#chkconfig --levels 235 mysqld on#/etc/init.d/mysqld start

Set passwords for the MySQL root account:

#mysql_secure_installation

[root@server1 ~]# mysql_secure_installation

NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!

In order to log into MySQL to secure it, we'll need the current
password for the root user. If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.

By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] <-- ENTER
... Success!

Normally, root should only be allowed to connect from 'localhost'. This
ensures that someone cannot guess at the root password from the network.

Disallow root login remotely? [Y/n] <-- ENTER
... Success!

By default, MySQL comes with a database named 'test' that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.

Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.

Reload privilege tables now? [Y/n] <-- ENTER
... Success!

Cleaning up...

All done! If you've completed all of the above steps, your MySQL
installation should now be secure.

Thanks for using MySQL!

3 Installing Apache2

Apache2 is available as a CentOS package, therefore we can install it like this:

#yum -y install httpd

#chkconfig --levels 235 httpd on

... and start Apache:

#/etc/init.d/httpd start

Now direct your browser to http://192.168.0.100, and you should see the Apache2 placeholder page:

Apache's default document root is /var/www/html on CentOS, and the configuration file is /etc/httpd/conf/httpd.conf. Additional configurations are stored in the /etc/httpd/conf.d/ directory.

4 Installing PHP5

We can install PHP5 and the Apache PHP5 module as follows:

# yum -y install php

#/etc/init.d/httpd restart

5 Testing PHP5 / Getting Details About Your PHP5 Installation

The document root of the default web site is /var/www/html. We will now create a small PHP file (info.php)
in that directory and call it in a browser. The file will display lots
of useful details about our PHP installation, such as the installed PHP
version.

#vi /var/www/html/info.php

Now we call that file in a browser (e.g. http://192.168.0.100/info.php):

As you see, PHP5 is working, and it's working through the Apache 2.0 Handler, as shown in the Server API
line. If you scroll further down, you will see all modules that are
already enabled in PHP5. MySQL is not listed there which means we don't
have MySQL support in PHP5 yet.

6 Getting MySQL Support In PHP5

To get MySQL support in PHP, we can install the php-mysql
package. It's a good idea to install some other PHP5 modules as well as
you might need them for your applications. You can search for available
PHP5 modules like this:

#yum search php

#yum -y install php-mysql

In the next step I will install some common PHP modules that are required by CMS Systems like Wordpress, Joomla and Drupal:

APC is a free and open PHP opcode cacher for caching and optimizing PHP
intermediate code. It's similar to other PHP opcode cachers, such as
eAccelerator and Xcache. It is strongly recommended to have one of these
installed to speed up your PHP page.

APC can be installed as follows:

#yum -y install php-pecl-apc

Now restart Apache2:

#/etc/init.d/httpd restart

Now reload http://192.168.0.100/info.php in
your browser and scroll down to the modules section again. You should
now find lots of new modules there, including the APC module:

7 phpMyAdmin

phpMyAdmin is a web interface through which you can manage your MySQL databases.

First we enable the RPMforge repository on our CentOS system as phpMyAdmin is not available in the official CentOS 6.5 repositories: